【摘要】 新一代静止图像压缩标准JPEG2000拥有压缩比高、支持多分辨率、逐渐传输显示解码等优点。然而自JPEG2000被提出以来,并没有得到大规模广泛的应用,主要是其实现代价比较高。针对JPEG2000中CDF9/7提升小波变换的硬件实现问题,提出一种适合大尺寸图像、高速、实时的硬件解决方案。该设计采用VHDL语言进行描述,并以Xilinx公司xc2v3000-4-fg676器件进行综合仿真验证,最高工作频率达到100MHz。分析表明,该方案能够满足对连续输入的数据进行实时处理的要求,并且所设计的系统具有功耗低、成本低等优点。更多还原

【Abstract】 As a new static image compression standard,JPEG2000 has many advantages,such as higher compression rate, multi-resolution format and progressive transmission show decoding.However,JPEG2000 has not been widely used in large scale for its high cost of implementation since it was proposed.In this paper,a high-speed,real-time hardware solution based on FPGA is present after the characteristics of the CDF9/7 wavelet in JPEG2000 standard are analyzed.The design based on xc2v3000-4- fg676 of Xilinx is described in VHDL language and the system’s clock attains 100MHz.Simulation results show that the solution can process the continuous input data in real time with low power and low cost.更多还原